Meshes can be single precision, so they’ll deteriorate faster than other types of geometry as you move away from the origin. In general it’s not a good idea to put stuff out in the middle of nowhere, the maths just becomes less and less accurate the bigger the numbers get.

We use standard single and double floating precision numbers in Rhino (mostly doubles, but meshes sometimes use single precision to (a) reduce memory load and (b) make it easier to draw them as graphics cards almost exclusive operate in single precision). With these number types you can have numbers as small as 10^{-300} and as big as 10^{+300}. However the amount of distinct values between zero and one is about the same as the amount of distinct values between one and infinity. That means that the gaps between adjacent values gets bigger and bigger the further away from zero you are. At some point, a+1=a because the gap between a and the next possible number is larger than two.